Effects of the modified expanded perlite materials on magnesium phosphate cement-based fireproof mortars: Mechanical property, thermal conductivity and microstructure

IF 6.5 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Chen Fang , Jing Wen , Ying Li , Lei Liu , Yang Shi , Yuchao Lyu , Baodong Xing , Jianming Yang
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引用次数: 0

Abstract

This paper focuses on the expanded perlite modifications and their effects on the properties of magnesium phosphate cement-based fireproof mortars. Silane impregnation solution, water glass, and stearic acid were employed for surface hydrophobicity modification of the expanded perlite particles. Eight types of the magnesium phosphate cement–based fireproof mortars were fabricated with and without various modified expanded perlite particles. The magnesium phosphate cement–based fireproof mortar morphology was characterized by a scanning electron microscope–energy–dispersive X–ray spectroscopy. The weight loss and chemical compositions of each magnesium phosphate cement–based fireproof mortar were visually analyzed by thermogravimetry and X–ray diffraction, respectively. Analysis reveals that the silane impregnation solution has a greater effect than stearic acid and water glass on the surface modification of the expanded perlite particles. The magnesium phosphate cement–based fireproof mortar prepared with the expanded perlite particles modified by the silane impregnation solution has better properties in terms of compressive strength and fire resistance than that by others, regardless of hydration age. In addition, the findings, in terms of mortar micrographs, thermogravimetry and chemical components, can contribute to explaining the differences observed in the performance of various magnesium phosphate cement–based fireproof mortars.
改性膨胀珍珠岩材料对磷酸镁水泥基防火砂浆的力学性能、导热性能和微观结构的影响
研究了膨胀珍珠岩改性对磷酸镁水泥基防火砂浆性能的影响。采用硅烷浸渍液、水玻璃和硬脂酸对膨胀珍珠岩颗粒进行表面疏水性改性。在掺加和不掺加各种改性膨胀珍珠岩颗粒的情况下,制备了8种磷酸镁水泥基防火砂浆。采用扫描电子显微镜-能谱仪对磷酸镁水泥基防火砂浆的形貌进行了表征。分别用热重法和x射线衍射目视分析了磷酸镁水泥基防火砂浆的失重和化学成分。分析表明,硅烷浸渍液对膨胀珍珠岩颗粒的表面改性效果大于硬脂酸和水玻璃。硅烷浸渍液改性膨胀珍珠岩颗粒制备的磷酸镁水泥基防火砂浆,无论水化龄期如何,其抗压强度和耐火性能均优于其他材料。此外,从砂浆显微图、热重和化学成分的角度来看,研究结果有助于解释不同磷酸镁水泥基防火砂浆性能的差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.60
自引率
19.40%
发文量
842
审稿时长
63 days
期刊介绍: Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.
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